An Assist Block with this helpful leaf will show up when you’ve failed a stage five or more times. It will change Mario into White Tanooki Mario, which makes him impervious to all enemies and obstacles, to help you finish the stage.

Having some serious trouble? If you fail more than ten times in a stage, the P-Wing will appear, letting you fly through the stage in no time flat. Only use it if you’re just completely stumped.